C# Entity Framework MCQ Questions with Answers (Latest 2026)

Q1. Which option best describes Entity Framework Core in C#/.NET?

A. ORM mapping CLR objects to relational rows. B. A vector database. C. A SQL parser only. D. A messaging broker.

Select an answer to check.

Answer: ORM mapping CLR objects to relational rows.

Here, ORM mapping CLR objects to relational rows. is the right choice. Microsoft's modern ORM. It aligns directly with what the question asks about which option best describes entity framework core in. A quick elimination of partially true options helps confirm it.

Q2. What is the primary purpose of Entity Framework Core?

A. A vector database. B. ORM mapping CLR objects to relational rows. C. A SQL parser only. D. A messaging broker.

Select an answer to check.

Answer: ORM mapping CLR objects to relational rows.

In this case, ORM mapping CLR objects to relational rows. is correct. Microsoft's modern ORM. It aligns directly with what the question asks about what is the primary purpose of entity framework. A quick elimination of partially true options helps confirm it.

Q3. Which statement about Entity Framework Core is most accurate?

A. A vector database. B. A SQL parser only. C. A messaging broker. D. ORM mapping CLR objects to relational rows.

Select an answer to check.

Answer: ORM mapping CLR objects to relational rows.

The best option here is ORM mapping CLR objects to relational rows.. Microsoft's modern ORM. It aligns directly with what the question asks about which statement about entity framework core is most. A quick elimination of partially true options helps confirm it.

Q4. How is Entity Framework Core best characterized?

A. ORM mapping CLR objects to relational rows. B. A SQL parser only. C. A vector database. D. A messaging broker.

Select an answer to check.

Answer: ORM mapping CLR objects to relational rows.

For this question, ORM mapping CLR objects to relational rows. is correct. Microsoft's modern ORM. It aligns directly with what the question asks about how is entity framework core best characterized. A quick elimination of partially true options helps confirm it.

Q5. Which option best describes DbContext in C#/.NET?

A. Session with the database and unit of work. B. A model class. C. A view engine. D. A controller in MVC.

Select an answer to check.

Answer: Session with the database and unit of work.

Session with the database and unit of work. is the correct answer here. Tracks changes and saves them. It aligns directly with what the question asks about which option best describes dbcontext in c#/.net. A quick elimination of partially true options helps confirm it.

Q6. What is the primary purpose of DbContext?

A. A view engine. B. A model class. C. A controller in MVC. D. Session with the database and unit of work.

Select an answer to check.

Answer: Session with the database and unit of work.

Here, Session with the database and unit of work. is the right choice. Tracks changes and saves them. This matches the core idea being tested around what is the primary purpose of dbcontext. A quick elimination of partially true options helps confirm it.

Q7. Which statement about DbContext is most accurate?

A. A view engine. B. A model class. C. A controller in MVC. D. Session with the database and unit of work.

Select an answer to check.

Answer: Session with the database and unit of work.

In this case, Session with the database and unit of work. is correct. Tracks changes and saves them. This matches the core idea being tested around which statement about dbcontext is most accurate. A quick elimination of partially true options helps confirm it.

Q8. How is DbContext best characterized?

A. A controller in MVC. B. A view engine. C. A model class. D. Session with the database and unit of work.

Select an answer to check.

Answer: Session with the database and unit of work.

The best option here is Session with the database and unit of work.. Tracks changes and saves them. This matches the core idea being tested around how is dbcontext best characterized. A quick elimination of partially true options helps confirm it.

Q9. Which option best describes DbSet<T> in C#/.NET?

A. Represents a table of entities of type T. B. A LINQ provider. C. A migration file. D. A SQL connection.

Select an answer to check.

Answer: Represents a table of entities of type T.

For this question, Represents a table of entities of type T. is correct. Queryable and trackable. This matches the core idea being tested around which option best describes dbset<t> in c#/.net. A quick elimination of partially true options helps confirm it.

Q10. What is the primary purpose of DbSet<T>?

A. A LINQ provider. B. A migration file. C. Represents a table of entities of type T. D. A SQL connection.

Select an answer to check.

Answer: Represents a table of entities of type T.

Represents a table of entities of type T. is the correct answer here. Queryable and trackable. This matches the core idea being tested around what is the primary purpose of dbset<t>. A quick elimination of partially true options helps confirm it.

Q11. Which statement about DbSet<T> is most accurate?

A. A SQL connection. B. A LINQ provider. C. A migration file. D. Represents a table of entities of type T.

Select an answer to check.

Answer: Represents a table of entities of type T.

Here, Represents a table of entities of type T. is the right choice. Queryable and trackable. That is exactly the concept behind which statement about dbset<t> is most accurate in this context. A quick elimination of partially true options helps confirm it.

Q12. How is DbSet<T> best characterized?

A. A migration file. B. Represents a table of entities of type T. C. A LINQ provider. D. A SQL connection.

Select an answer to check.

Answer: Represents a table of entities of type T.

In this case, Represents a table of entities of type T. is correct. Queryable and trackable. That is exactly the concept behind how is dbset<t> best characterized in this context. A quick elimination of partially true options helps confirm it.

Q13. Which option best describes change tracking in C#/.NET?

A. No tracking ever. B. EF tracks entity states (Added, Modified, Deleted). C. Manual SQL only. D. Pure DTO mapping.

Select an answer to check.

Answer: EF tracks entity states (Added, Modified, Deleted).

The best option here is EF tracks entity states (Added, Modified, Deleted).. Drives SaveChanges behavior. That is exactly the concept behind which option best describes change tracking in c#/.net in this context. A quick elimination of partially true options helps confirm it.

Q14. What is the primary purpose of change tracking?

A. Manual SQL only. B. EF tracks entity states (Added, Modified, Deleted). C. No tracking ever. D. Pure DTO mapping.

Select an answer to check.

Answer: EF tracks entity states (Added, Modified, Deleted).

For this question, EF tracks entity states (Added, Modified, Deleted). is correct. Drives SaveChanges behavior. That is exactly the concept behind what is the primary purpose of change tracking in this context. A quick elimination of partially true options helps confirm it.

Q15. Which statement about change tracking is most accurate?

A. Pure DTO mapping. B. EF tracks entity states (Added, Modified, Deleted). C. No tracking ever. D. Manual SQL only.

Select an answer to check.

Answer: EF tracks entity states (Added, Modified, Deleted).

EF tracks entity states (Added, Modified, Deleted). is the correct answer here. Drives SaveChanges behavior. That is exactly the concept behind which statement about change tracking is most accurate in this context. A quick elimination of partially true options helps confirm it.

Q16. How is change tracking best characterized?

A. EF tracks entity states (Added, Modified, Deleted). B. Manual SQL only. C. Pure DTO mapping. D. No tracking ever.

Select an answer to check.

Answer: EF tracks entity states (Added, Modified, Deleted).

Here, EF tracks entity states (Added, Modified, Deleted). is the right choice. Drives SaveChanges behavior. It fits the requirement in the prompt about how is change tracking best characterized. A quick elimination of partially true options helps confirm it.

Q17. Which option best describes AsNoTracking in C#/.NET?

A. Disables LINQ. B. Sets connection timeout. C. Tracks more aggressively. D. Returns untracked, read-only entities for performance.

Select an answer to check.

Answer: Returns untracked, read-only entities for performance.

In this case, Returns untracked, read-only entities for performance. is correct. Good for read-only queries. It fits the requirement in the prompt about which option best describes asnotracking in c#/.net. A quick elimination of partially true options helps confirm it.

Q18. What is the primary purpose of AsNoTracking?

A. Disables LINQ. B. Returns untracked, read-only entities for performance. C. Sets connection timeout. D. Tracks more aggressively.

Select an answer to check.

Answer: Returns untracked, read-only entities for performance.

The best option here is Returns untracked, read-only entities for performance.. Good for read-only queries. It fits the requirement in the prompt about what is the primary purpose of asnotracking. A quick elimination of partially true options helps confirm it.

Q19. Which statement about AsNoTracking is most accurate?

A. Tracks more aggressively. B. Disables LINQ. C. Returns untracked, read-only entities for performance. D. Sets connection timeout.

Select an answer to check.

Answer: Returns untracked, read-only entities for performance.

For this question, Returns untracked, read-only entities for performance. is correct. Good for read-only queries. It fits the requirement in the prompt about which statement about asnotracking is most accurate. A quick elimination of partially true options helps confirm it.

Q20. How is AsNoTracking best characterized?

A. Returns untracked, read-only entities for performance. B. Tracks more aggressively. C. Sets connection timeout. D. Disables LINQ.

Select an answer to check.

Answer: Returns untracked, read-only entities for performance.

Returns untracked, read-only entities for performance. is the correct answer here. Good for read-only queries. It fits the requirement in the prompt about how is asnotracking best characterized. A quick elimination of partially true options helps confirm it.

Q21. Which option best describes LINQ to Entities in C#/.NET?

A. Translates LINQ queries to SQL. B. LINQ to Objects on memory. C. Raw SQL only. D. Pure stored procs.

Select an answer to check.

Answer: Translates LINQ queries to SQL.

Here, Translates LINQ queries to SQL. is the right choice. Composable queries. This is the most accurate statement for which option best describes linq to entities in. A quick elimination of partially true options helps confirm it.

Q22. What is the primary purpose of LINQ to Entities?

A. Raw SQL only. B. Translates LINQ queries to SQL. C. Pure stored procs. D. LINQ to Objects on memory.

Select an answer to check.

Answer: Translates LINQ queries to SQL.

In this case, Translates LINQ queries to SQL. is correct. Composable queries. This is the most accurate statement for what is the primary purpose of linq to. A quick elimination of partially true options helps confirm it.

Q23. Which statement about LINQ to Entities is most accurate?

A. Pure stored procs. B. Raw SQL only. C. Translates LINQ queries to SQL. D. LINQ to Objects on memory.

Select an answer to check.

Answer: Translates LINQ queries to SQL.

The best option here is Translates LINQ queries to SQL.. Composable queries. This is the most accurate statement for which statement about linq to entities is most. A quick elimination of partially true options helps confirm it.

Q24. How is LINQ to Entities best characterized?

A. Raw SQL only. B. LINQ to Objects on memory. C. Translates LINQ queries to SQL. D. Pure stored procs.

Select an answer to check.

Answer: Translates LINQ queries to SQL.

For this question, Translates LINQ queries to SQL. is correct. Composable queries. This is the most accurate statement for how is linq to entities best characterized. A quick elimination of partially true options helps confirm it.

Q25. Which option best describes eager loading (Include) in C#/.NET?

A. Loads related entities in the same query. B. Disables loading. C. N+1 by design. D. Lazy loads always.

Select an answer to check.

Answer: Loads related entities in the same query.

Loads related entities in the same query. is the correct answer here. Reduces round-trips when known. This is the most accurate statement for which option best describes eager loading (include) in. A quick elimination of partially true options helps confirm it.

Q26. What is the primary purpose of eager loading (Include)?

A. Lazy loads always. B. Loads related entities in the same query. C. Disables loading. D. N+1 by design.

Select an answer to check.

Answer: Loads related entities in the same query.

Here, Loads related entities in the same query. is the right choice. Reduces round-trips when known. It aligns directly with what the question asks about what is the primary purpose of eager loading. The other options are either incomplete or contextually incorrect.

Q27. Which statement about eager loading (Include) is most accurate?

A. Loads related entities in the same query. B. Lazy loads always. C. N+1 by design. D. Disables loading.

Select an answer to check.

Answer: Loads related entities in the same query.

In this case, Loads related entities in the same query. is correct. Reduces round-trips when known. It aligns directly with what the question asks about which statement about eager loading (include) is most. The other options are either incomplete or contextually incorrect.

Q28. How is eager loading (Include) best characterized?

A. N+1 by design. B. Disables loading. C. Loads related entities in the same query. D. Lazy loads always.

Select an answer to check.

Answer: Loads related entities in the same query.

The best option here is Loads related entities in the same query.. Reduces round-trips when known. It aligns directly with what the question asks about how is eager loading (include) best characterized. The other options are either incomplete or contextually incorrect.

Q29. Which option best describes explicit loading in C#/.NET?

A. Eager Include. B. Lazy proxies always. C. No loading. D. Loads related entities on demand via Load().

Select an answer to check.

Answer: Loads related entities on demand via Load().

For this question, Loads related entities on demand via Load(). is correct. Manual control. It aligns directly with what the question asks about which option best describes explicit loading in c#/.net. The other options are either incomplete or contextually incorrect.

Q30. What is the primary purpose of explicit loading?

A. No loading. B. Eager Include. C. Lazy proxies always. D. Loads related entities on demand via Load().

Select an answer to check.

Answer: Loads related entities on demand via Load().

Loads related entities on demand via Load(). is the correct answer here. Manual control. It aligns directly with what the question asks about what is the primary purpose of explicit loading. The other options are either incomplete or contextually incorrect.

Q31. Which statement about explicit loading is most accurate?

A. Lazy proxies always. B. Loads related entities on demand via Load(). C. Eager Include. D. No loading.

Select an answer to check.

Answer: Loads related entities on demand via Load().

Here, Loads related entities on demand via Load(). is the right choice. Manual control. This matches the core idea being tested around which statement about explicit loading is most accurate. The other options are either incomplete or contextually incorrect.

Q32. How is explicit loading best characterized?

A. No loading. B. Eager Include. C. Loads related entities on demand via Load(). D. Lazy proxies always.

Select an answer to check.

Answer: Loads related entities on demand via Load().

In this case, Loads related entities on demand via Load(). is correct. Manual control. This matches the core idea being tested around how is explicit loading best characterized. The other options are either incomplete or contextually incorrect.

Q33. Which option best describes lazy loading in C#/.NET?

A. Loads related entities on first access via proxies. B. Eager Include. C. Always preloaded. D. No loading at all.

Select an answer to check.

Answer: Loads related entities on first access via proxies.

The best option here is Loads related entities on first access via proxies.. Risky for N+1 unless careful. This matches the core idea being tested around which option best describes lazy loading in c#/.net. The other options are either incomplete or contextually incorrect.

Q34. What is the primary purpose of lazy loading?

A. No loading at all. B. Loads related entities on first access via proxies. C. Always preloaded. D. Eager Include.

Select an answer to check.

Answer: Loads related entities on first access via proxies.

For this question, Loads related entities on first access via proxies. is correct. Risky for N+1 unless careful. This matches the core idea being tested around what is the primary purpose of lazy loading. The other options are either incomplete or contextually incorrect.

Q35. Which statement about lazy loading is most accurate?

A. Eager Include. B. Loads related entities on first access via proxies. C. No loading at all. D. Always preloaded.

Select an answer to check.

Answer: Loads related entities on first access via proxies.

Loads related entities on first access via proxies. is the correct answer here. Risky for N+1 unless careful. This matches the core idea being tested around which statement about lazy loading is most accurate. The other options are either incomplete or contextually incorrect.

Q36. How is lazy loading best characterized?

A. Eager Include. B. Always preloaded. C. Loads related entities on first access via proxies. D. No loading at all.

Select an answer to check.

Answer: Loads related entities on first access via proxies.

Here, Loads related entities on first access via proxies. is the right choice. Risky for N+1 unless careful. That is exactly the concept behind how is lazy loading best characterized in this context. The other options are either incomplete or contextually incorrect.

Q37. Which option best describes the N+1 problem in C#/.NET?

A. A bulk insert pattern. B. One query plus N follow-up queries due to lazy loading. C. A single efficient query. D. A bulk update pattern.

Select an answer to check.

Answer: One query plus N follow-up queries due to lazy loading.

In this case, One query plus N follow-up queries due to lazy loading. is correct. Mitigate with Include/projections. That is exactly the concept behind which option best describes the n+1 problem in in this context. The other options are either incomplete or contextually incorrect.

Q38. What is the primary purpose of the N+1 problem?

A. A bulk update pattern. B. One query plus N follow-up queries due to lazy loading. C. A bulk insert pattern. D. A single efficient query.

Select an answer to check.

Answer: One query plus N follow-up queries due to lazy loading.

The best option here is One query plus N follow-up queries due to lazy loading.. Mitigate with Include/projections. That is exactly the concept behind what is the primary purpose of the n+1 in this context. The other options are either incomplete or contextually incorrect.

Q39. Which statement about the N+1 problem is most accurate?

A. A bulk update pattern. B. One query plus N follow-up queries due to lazy loading. C. A bulk insert pattern. D. A single efficient query.

Select an answer to check.

Answer: One query plus N follow-up queries due to lazy loading.

For this question, One query plus N follow-up queries due to lazy loading. is correct. Mitigate with Include/projections. That is exactly the concept behind which statement about the n+1 problem is most in this context. The other options are either incomplete or contextually incorrect.

Q40. How is the N+1 problem best characterized?

A. A single efficient query. B. A bulk update pattern. C. A bulk insert pattern. D. One query plus N follow-up queries due to lazy loading.

Select an answer to check.

Answer: One query plus N follow-up queries due to lazy loading.

One query plus N follow-up queries due to lazy loading. is the correct answer here. Mitigate with Include/projections. That is exactly the concept behind how is the n+1 problem best characterized in this context. The other options are either incomplete or contextually incorrect.

Q41. Which option best describes migrations in C#/.NET?

A. Versioned schema changes managed in code. B. Pure backups. C. Manual SQL DDL only. D. Pure data exports.

Select an answer to check.

Answer: Versioned schema changes managed in code.

Here, Versioned schema changes managed in code. is the right choice. Add/Update-Database commands. It fits the requirement in the prompt about which option best describes migrations in c#/.net. The other options are either incomplete or contextually incorrect.

Q42. What is the primary purpose of migrations?

A. Pure data exports. B. Versioned schema changes managed in code. C. Pure backups. D. Manual SQL DDL only.

Select an answer to check.

Answer: Versioned schema changes managed in code.

In this case, Versioned schema changes managed in code. is correct. Add/Update-Database commands. It fits the requirement in the prompt about what is the primary purpose of migrations. The other options are either incomplete or contextually incorrect.

Q43. Which statement about migrations is most accurate?

A. Pure data exports. B. Pure backups. C. Versioned schema changes managed in code. D. Manual SQL DDL only.

Select an answer to check.

Answer: Versioned schema changes managed in code.

The best option here is Versioned schema changes managed in code.. Add/Update-Database commands. It fits the requirement in the prompt about which statement about migrations is most accurate. The other options are either incomplete or contextually incorrect.

Q44. How is migrations best characterized?

A. Pure backups. B. Manual SQL DDL only. C. Pure data exports. D. Versioned schema changes managed in code.

Select an answer to check.

Answer: Versioned schema changes managed in code.

For this question, Versioned schema changes managed in code. is correct. Add/Update-Database commands. It fits the requirement in the prompt about how is migrations best characterized. The other options are either incomplete or contextually incorrect.

Q45. Which option best describes Code First in C#/.NET?

A. CSV import only. B. Database designer only. C. Schema generated from C# classes. D. Schema first then classes.

Select an answer to check.

Answer: Schema generated from C# classes.

Schema generated from C# classes. is the correct answer here. Encouraged in EF Core. It fits the requirement in the prompt about which option best describes code first in c#/.net. The other options are either incomplete or contextually incorrect.

Q46. What is the primary purpose of Code First?

A. Database designer only. B. CSV import only. C. Schema generated from C# classes. D. Schema first then classes.

Select an answer to check.

Answer: Schema generated from C# classes.

Here, Schema generated from C# classes. is the right choice. Encouraged in EF Core. This is the most accurate statement for what is the primary purpose of code first. The other options are either incomplete or contextually incorrect.

Q47. Which statement about Code First is most accurate?

A. Schema first then classes. B. Schema generated from C# classes. C. CSV import only. D. Database designer only.

Select an answer to check.

Answer: Schema generated from C# classes.

In this case, Schema generated from C# classes. is correct. Encouraged in EF Core. This is the most accurate statement for which statement about code first is most accurate. The other options are either incomplete or contextually incorrect.

Q48. How is Code First best characterized?

A. Schema generated from C# classes. B. Schema first then classes. C. CSV import only. D. Database designer only.

Select an answer to check.

Answer: Schema generated from C# classes.

The best option here is Schema generated from C# classes.. Encouraged in EF Core. This is the most accurate statement for how is code first best characterized. The other options are either incomplete or contextually incorrect.

Q49. Which option best describes Database First in C#/.NET?

A. Pure JSON modeling. B. Classes generated from existing DB schema. C. Code first only. D. No schema mapping.

Select an answer to check.

Answer: Classes generated from existing DB schema.

For this question, Classes generated from existing DB schema. is correct. Used with legacy DBs. This is the most accurate statement for which option best describes database first in c#/.net. The other options are either incomplete or contextually incorrect.

Q50. What is the primary purpose of Database First?

A. Classes generated from existing DB schema. B. Code first only. C. Pure JSON modeling. D. No schema mapping.

Select an answer to check.

Answer: Classes generated from existing DB schema.

Classes generated from existing DB schema. is the correct answer here. Used with legacy DBs. This is the most accurate statement for what is the primary purpose of database first. The other options are either incomplete or contextually incorrect.